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FLORA INDICA.                                   177

Tribus I. CO

Petala scpalis majora, parutn irabricata. dlbumen irregular! ter runri-
natum. ^Radicula supera, a hilo remota. Cotykdones magna^ patentim
divaricate.
1. COSCINIUM, Colebrooke.
Perciria, LlndL
S&pala 6, rotundata, bractea 1 conform! stipata. Petala 3, sepalis
majora, patentia,-elliptiea, sestivatione parum imbricata. MAS. Sta-
mina 6, exteriora (petalis alterna) libera, interiora ad medium raona-
delpha. Fllamenttt cylindrica ; (tntlmw aduatrc, ovalcs, cxteriores uni-
locularesj intcriorcs didymie luloculares. FCEM. Sfowhtn 6, abortiva.
Ovana 3-C>, snbglobosa, stylis subiilatis rciloxis. J)ntp& :globosa5,
oirnosrc. Putamen crassum, osseiun, intus procoasum globo.su m ci
spongiosum continens ; pedicello osseo basi putaminis inscrto. Semen
externe visum subglobosuin, intus cavum et circa processum cojidyli-
formem convolutum. Testa tennis, Isevis. Albumen oleosum, carnosum,
bine (quo latere bikira spectat) plicis podospcrinii vcl membranes exte-
rioris seminis rumiuatiim. Embryo fas rectvts; radioula pavva cylin-
drica supera, apiccm drnpac spectnus. . Gotykdones tenuissunie, rotun-
data?, margine irvcgularcs, divaricatse, undulatas, sccuudum Gsertnei
foraminibus crebris pci-foratse, vcl fide Miers profunde sinuato-iaci-
niatse. =-Frutices alte scandentes, petiolia cylindricis Lasi et apice incras-
satist foliis amplis palminervlis, junioribus saltern peltatis^ floribus in ca-
pitula globota dense congest is.
The genus Coseinium differs so much from the rest of the Order in the compa-
ratively large size of its petals, and in the structure of the seed, as to deserve to
be distinguished as a separate tribe. The radicle, if Gfcrtncr's plate may be relied
on, is at the geometrical apex of the seed ; and the cotyledons, which are nearly cir-
cular, expand widely, and descend one on each side of the internal process of the
putamen; which occupies the hollow in the middle of the seed.
The structure of the drupe of Coscimnm is unfortunately as yet so imperfectly
understood, that we cannot express ourselves decidedly regarding it. The nutri-
ent Tcsscls pass into the' seed throtfgvh two canals, the external apertures of which
are' conspicuous on the putamen, oncv on each side of the hilum. Gartner repre-
sents and describes the woody process which rises from the hilum as forming an
integral portion of the- seed, and as being gradually broken up into plates, which
penetrate into tKj substance of the albumen. Mr. Miers, on the oilier hand, thinks
that the coudyloid process is quite distinct from the membrane which lines it, and
which gives off the plates JHL wnich the albumen is ruminated. The latter structure
is undoubtedly more analogptfs -to tii^t^of the rest of the Order; but it appears. to us
that the view of Gfcrtner is rnor'ejtn, accordance with the specimens we have examined;
of which, however, one only was in a^good stafc, all the others being Decayed, The
pntamen is very thick and hard, and is composed of columnar fibres, extending through
its whole thickness, like those of the middle coat of the seed of the nutmeg. In-
deed, if the, analogy of structure to other fifenifpennaces?, especially in the tubular
canals whicfc Dcnetrate through the putamen, were not quite opposed to aotii & view,
we should be inclined to' suggest the possibility of the woody coat of Ootcinittm being
an integument of the seed, and its internal process Analogous to the plates (gradually
branching from the chalaza) by 'which the albume&'of nutmegs is' ruminated.
2 A